Happy Together的博客

3.1 Valid Palindrome描述Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoringcases.For example,”A man, a plan, a canal: Panama” is a palindrome

3.8 Longest Common Prefix描述Write a function to find the longest common prefix string amongst an array of strings.分析从位置0 开始，对每一个位置比较所有字符串，直到遇到一个不匹配。横向扫描，每个字符串与第0 个字符串，从左到右比较，直到遇到一个不匹配，然后继续下一个

字符串相关最后写